Sawmill set-works.



No. 65|,5o2. .Patented :une l2, |900.

E. E. FITZGERALD.

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(Appliemon med necjls, 1899.) (No Model.) A I 3 Sheets-Sheet I.

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No. 5|,5o2. Patented :une l2, |900.

E. E. FITZGERALD.

SAWMILL SET WORKS.

(Application led Dec. 18, 1899.)

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Patented lune I2,y |901),v E. E. FITZGERALD.A sAwmlLL sET'wonKs.

(Appxicaion med Dec. 1s, 1899.)

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EDVARD E. FITZGERALD, OF MILWAUKEE, WISCONSIN, ASSIGNOR OF ONE- HALF TO THE EDWARD P. ALLIS COMPANY, OF SAME PLAO 1.

SAWM I LL S ET-WO RKS.

SPECIFICATION forming part of Letters Patent N o. 651,502, dated June 12, 1,900. Application tiled December 18. 1899. Serial No. 740,742. (No model.)

To ctZZ whom, it may concern.-

Be it known that LEDWARD E. FITZGERALD, a citizen of the United States, residing at Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented certain new and useful Improvements in SawmillSet- Works, of which the following is a specification.

My present invention relates to improvero ments in sawmill set-works, the construction and advantages of which will be hereinafter set forth, reference being had to the aunexed drawings, wherein- Figure l is a front elevation of a portion of a sawmill-carriage with the improved mechanism thereon; Fig. 2, a top plan view, partly in section, of the power-cylinder and certain of the working parts; Fig. 3, a top plan view of the carriage and setting Vmechzo anism; Fig. 4, a transverse sectional view of the carriage; Fig. 5, a vertical sectional view of the regulating-chamber for controlling the movement of the power-piston, and consequently the set; and Figs. 6 and 7, horizonz 5 tal sectional views of the same, showinga different relation or position of the parts.

The object of my present invention is to provide a simple and yet at the same time highly-efficient mechanism for actuating the 3o set-works of a sawmill-carriage, 011e in which the degree of movement to be imparted to the knees may be easily determined and regulated.

vThe invention in its broadest sense com- 3 5 prises a power-cylinder, connections intermediate the piston of said cylinderand the knees, and means for controlling and measuring the iiow of liquid from the cylinder to determine its movement, and consequently 4o the set imparted to the knees.

Referring to the drawings, A denotes the carriage, and B the knees mounted thereon, which are actuated through suitable connections with a shaft C, carrying a gearD, movable into and out of mesh with a similar gear E, the position of said gear D being controlled by a shifting lever F.

Gear E is mounted upon a shaft G, carrying at its opposite end a pinion H, which en- 5o gages a rack I, connected to the piston-rod J of a cylinder K. Said cylinder has a pipe L leading into one end thereof, while its opposite end is in communication with a pipe M through a connection N. Pipe L is in communication with a port O, formed in a valve-casing P, while one end of pipe M likewise enters a port Q. in said' casing. A pipe R, conveying liquid under pressure from any suitable source, also enters the valve-casing. Within the casing there is 6o mounted a slide or D valve S, controlling the ports O and Q and likewise an exhaustport T, said slide being actuated and positioned through the agency of a lever U and pitman or connecting-arm V. The construction and formation of the slide are such that when the port O is open to the casing, and consequently in communication with pipe R, port Q will be closed and the exhaust-port T likewise cut 0E from communication. This 7o position is indicated in full lines in Fig. 2, and liuid under pressure is consequently passing in behind the piston in cylinder K, tending to force the same forward. When, however, the slide-valve is shifted to the positio'n indicated in dotted lines, ports O and T will be in communication, while the liquid under pressure will pass through port Q, pipe M, and into the cylinder through connection N in front of the piston, serving to 8o force the same back.`

To regulate the forward movement of the piston, and consequently the set, and to place the same under direct control of the operator, I provide means for regulating or measuring the quantity of liquid which may ilow out of the forward end of the cylinderas the liquid under pressure is tending to move the piston so as to actuate the set-works. Preferably this means is placed upon the carriage, 9o where it is within easy reach of the operator. Said means in the form shown comprises a shell or casing a, having seated therein a measuring chamber or cylinder b. Said shell or casing ct is provided with two ports or openings, one of which is in communication with pipe M or an extension thereof, while the other port forms an exhaust for the apparatus and is preferably provided with a pipe or connection @,which leads to any desired point. roo

Measuring chamber or cylinder b is rotatably mounted within the shell or casing a and is provided with two ports d and c, which are so arranged with relation to the ports in the shell or casing that one or the other of said ports d and e may be brought into line with one or the other of the ports in the shell or casing, but in no position can the two be opened at the same time. The different relation of the ports is shown in Figs. 6 and 7.

In the position shown in Fig. 6 the port d is in communication with the pipe M, and liquid may pass from the forward part of the cylinder in front of the piston through connection N and pipe M into the measuring chamber or cylinder l).

In the position shown in Fig. 7 the measu rin g chamber or cylinder has been moved or rotated so as to bring the porteinto position with the exhaust-pipe c, when of course the liquid will pass out therefrom, and no more liquid can enter therein until the parts are brought back into the position shown in Fig. 6.

To assist in the rotation or manipulation of the measuring chamber or cylinder, it is provided with a handle or arm f, which projects out therefrom, as clearly indicated in Figs. l, 4, and 5.

It is designed that the liquid which passes out of the cylinder K forward of its piston into the measuring chamber or cylinder b shall regulate the movement of the piston, and consequently the movement of the knees, through the connections above described. To accomplish this, it is of course essential that the capacity of the measuring chamber or cylinder shall be varied to determine the quantity of liquid which may pass out of the cylinder at each forward movement of the setworks. To regulate this, the measuring chamber or cylinder is provided with a piston g, movable up and down therein, so that its capacity may be changed as desired. Said pist-on is connected to a rod 7t, which in turn is connected at its outer end to a handle or lever t, fulqrumed upon a rack or quadrantj, extending up from the shell or casing. As will be noted upon reference to Fig. 4, said rack is provided with a series of stops set to a scale to determine the movement of the lever or handle t, and consequently the descent or ascent of the piston g. From this it will be seen that the capacity of the measururing chamber or cylinder may be varied as desired and the set of the knees determined absolutely, it being necessary only to adjust the lever 'L' in the iirst instance and thereafter to operate leverf and the measuring-chamber or valve to permit it to receive and exhaust the liquid.

Where heavy lumber is used, a stop-cock 7c is preferablyemployed, said stop-cock being, as shown upon reference to Figs. l and 3, placed in the pipe M, intermediate the main cylinder K and the measuring chamber. Through this stop-cock the liquid can be exhausted from in front of the piston and a continuous movement for the full travel given tothe knees, if desired. It can also be used for setting thick lumber quickly or for un-4 loading large timbers from the head-blocks, which are now usually canted olf by hand.

To recede the knees1 lever U is moved to that position which will exhaust the pressure from back of the piston and turn it onto the front side thereof, forcing the piston, rack, and the knees back the desired distance. When this is accomplished, the slide-valveis brought to that position where it holds the.

water or other liquid under pressure in front and admits pressure behind the piston, leav ing the machine ready to set again.

The function of the lever F is to permit the driving mechanism to be thrown out of connection with the knees, so that when power is not to be had for any reason the set-shaft C may be turned with ease.

The liquid is delivered to and received from the moving carriage through telescopic pipes, this feature not being illustrated, as it is Well known and forms no part of my present invention.

It is manifest that the invention may be varied in many details of its construction, and I do not therefore desire to limit myself to the particular mechanism shown. I desire, however, to be understood as claiming, broadly, a power-cylinder for actuating the knees and means for admitting fiuid thereto and measuring the fluid forced out therefrom to regulate the stroke of the piston, and consequently the set imparted to the knees.

Set-shaft C is preferably connected with an index-wheel C', Fig. 3, to show the relative position of the knees to the saw.

IIaving thus described my invention, what I claim isl. In combination with a sawmill-carriage and suitable setting mechanism mounted thereon; a powcneylinder for actuating said mechanism; means for admitting liquid under pressure to said cylinder in rear of its piston; and means for regulating the flow of liquid from the forward end of said cylinder in front of the piston in predetermined quantities and at different intervals, si'lbstantially as described.

2. In combination with a sawmill-carriage and suitable setting mechanism carried therebyg'a power-cylinder mounted on the carriage and adapted to actuate the setting mechanism; means for admitting liquid under pres- IOO IIO

sure to one end of the cylinder in rear of its ward end of the cylinder; and means for permitting the liquid under pressure to escape from the forward end of the cylinder in predetermined quantities, whereby the piston may be moved forward step by step, substantially as described.

4. In combination with a sawmill-carriage and suitable setting mechanism mounted thereon; a power-cylinder; means for admitting liquid under pressure to said cylinder in rear of its piston; and means connected tothe opposite end of the cylinder permitting the discharge of liquid therefrom in front of the piston, said means being variable as to its capacity for reception of liquid from the piston, substantially as and for the purpose described.

5. In combination with a sawmill carriage and suitable setting mechanism mounted thereon; apower-cylinder; a piston mounted in said cylinder; connections intermediate said piston and the setting mechanism; means for admitting liquid underpressure to the cylinderin rearof the piston a measuring-chamber communicating with the opposite end of the cylinderpermitting discharge of liquid therefrom, said chamber being variable as to its capacity for reception of liquid; and means for shutting off communication between-said chamber and the piston.

6. In combination with a sawmill-carriage and suitable setting mechanism carried thereby; a poWer-cylinderfor actuating said mechanism; and means for admitting fluid thereto and measuring the fiuid forced out therefrom to regulate the stroke of the piston, substantially as described.

7. In combination with a sawmill-carriage and suitable setting mechanism carried thereby; a power-cylinder; a piston workin g therein and connected to the setting mechanism; a

- source of liquid under pressure; connections between said source and the ends of the cylinder; a valve controlling said connections, closing one as the other is opened and means for permitting the escape of liquid from the cylinder forward of the piston in .predetermined quantities for each forward actuation of the setting mechanism.

8. In combination with a sawmill-carriage and suitable setting mechanism carried thereby; a power-cylinder; a piston working therein and connected to the setting mechanism; a source of liquid under pressure; connections between said source and the ends of the cylinder; a valve controlling said connections, closing one as the other is opened; and a measuring-chamber connected to the forward end of the cylinder, substantially as and for the purpose described.

9. In combination with a sawmill-carriage and suitable setting mechanism carried thereby; a power-cylin der; a piston workin g therein and connected to the setting mechanism; means for admitting fluid under pressure to the opposite ends of the cylinder; and a measuring-chamber connected to the forward end of the cylinder, provided with receiving and discharge ports, and means for bringing one or the other of said por-ts into operative position.

10.- In combination with a sawmill-carriage and suitable setting mechanism carried thereby; a power-cylinder; a piston working therein and connected to the setting mechanism; means for admitting liquid under pressure to opposite ends of the cylinder; a measuringchamber connected to the forward end of the cylinder, provided with receiving and discharge ports, and means for bringing one 'or the other of said ports in to operative position; and means for varying the capacity of said measuring-chamber.

ll. Incombination with a sawmill-carriage and suitable setting mechanism carried thereby; a power-cylinder; a piston working therein and connected to the setting mechanism; means for admitting liquid under pressure to the opposite ends of said cylinder; a measuring-chamber connected to the forward end of the cylinder, provided with receiving and discharge ports; means for bringing one or the other of said ports into operative position; a piston working in said measuring-chamber and serving to increase or diminlsh its capacity; and a setting-lever connected to said piston, substantially as described.

12. In colnbination with a sawmill-carriage and suitable setting mechanism carried thereby; a power-cylinder a piston working therein and connected to the setting mechanism; means for admitting liquid under pressure to the opposite ends of the cylinder; a valve for controlling the flow of said liquid to one or the other end of said cylinder; a measuringchamber connected to the forward end of the cylinder, provided with receiving and discharge ports; means for bringing one or the other of said ports into position; a piston working in said measuring-chamber; and a lever connected to said piston and adapted to operate the same, substantially as described.

13. In combination with a sawmill-carriage and suitable setting mechanism carried thereby; a power-cylinder; a piston Working therein and connected to the setting mechanism; means for admitting liquid under pressure to the opposite ends of the cylinder; a valve for controlling the iiow of said liquid to one or the other end of said cylinder 5.a measuring-chamber; connections intermediate said chamber and the forward end of the cylinder; and a by-pass valve located in said connection between the cylinder and the measuring-chamber.

14. In combination with a sawmill-carriage and suitable setting mechanism carried thereby; a power-cylinder; avalve chamber o1' casing; connections intermediate said chamber and the opposite ends of the cylinder; connection between said casing and a suitable source of liquid under pressure; a valve mounted within said casing and adapted to control the flow of liquid from the casing to IIO IZO

one or the other end of said cylinder; a measuring chamber; connections intermediate said measuring-chamber and the forward end of the cylinder; an exhaustport for said measuring-chamber; means for throwing the measuring-chamber into communication with the forward end of the cylinder, or opening the exhaust-port thereof; and means for varying the capacity of said measuring-chamber.

15. In combination with a sawmill-carriage and suitable setting mechanism carried thereby; a power-cylinder; a piston working therein and connected to the setting mechanism; a valve-casingP; connections extending from said casing to the opposite ends of the powercylinder; a source of liquid-supply entering said casing; an exhaust-port T formed in said casing; a slidevalve mounted within said casing and adapted to operate substantially as described; connections for operating said valve; a measuring-chamber; connections intermediate said measuring-chamber and the forward end of the piston; means for exhausting said chamber and cutting off communication therewith to the cylinder; and means for varying the capacity of said cylinder, substantially as described.

16. In combination with a sawmill-carriage and suitable setting mechanism carried thereby; a power-cylinder; a piston working in said cylinder and connected to the setting mechanism; a source of liquid-supply, and connections intermediate said'source and the opposite ends of the cylinder for delivering the liquid under pressure to one or the other end of said cylinder; a measuring-chamber;

connections intermediate said measuringchamber and the forward end of the cylinder; apiston mounted in said measuring-chamber; a lever connected to said piston; and means for adjusting said lever, whereby the piston within the measuring-chamber will be moved and its capacity varied, as and for the purpose described.

17. In combination with a sawmill-carriage and suitable setting mechanism mounted thereon; a power-cylinder; a source of liquid-supply; connections intermediate the opposite ends of said cylinder and said supply, whereby the liquid may be delivered to one or the other end of said cylinder; a shell or casing a; connections intermediate said shell or casing and the forward en d of the cylinder; a m easuring-chamber b rotatably mounted within said shell or casing and provided with ports adapted to register with an exhaust-passage and the connection between the shell and the forward end of the cylinder; a piston working within said measuring-chamber; a lever 'i connected to said piston; and means for adjusting said lever, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

EDWARD E. FITZGERALD.

iVitnesses:

B. A. BRENNAN, F. W. GREENLEAF. 

